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All about Helium

*STP = standard temperature and pressure

Helium Information

Name Helium
Standard Atomic Weight (Ar)4.002602
Melting point 0.95 K
Boiling point4.222 K 
Colour @ STP colourless
Density @ STP0.1786 g/L
Form @ STPdata
DiscovererPierre Janssen
Named bySir Norman Lockyer

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